// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Copyright 2022 The Lynx Authors. All rights reserved.
// Licensed under the Apache License Version 2.0 that can be found in the
// LICENSE file in the root directory of this source tree.

#ifndef CLAY_FLOW_LAYERS_PERFORMANCE_OVERLAY_LAYER_H_
#define CLAY_FLOW_LAYERS_PERFORMANCE_OVERLAY_LAYER_H_

#include <string>

#include "base/include/fml/macros.h"
#include "clay/flow/instrumentation.h"
#include "clay/flow/layers/layer.h"
#include "clay/gfx/rendering_backend.h"

class SkTextBlob;

namespace clay {

const int kDisplayRasterizerStatistics = 1 << 0;
const int kVisualizeRasterizerStatistics = 1 << 1;
const int kDisplayEngineStatistics = 1 << 2;
const int kVisualizeEngineStatistics = 1 << 3;

class PerformanceOverlayLayer : public Layer {
 public:
  static clay::GrTextBlobPtr MakeStatisticsText(const Stopwatch& stopwatch,
                                                const std::string& label_prefix,
                                                const std::string& font_path);

  bool IsReplacing(DiffContext* context, const Layer* layer) const override {
    return layer->as_performance_overlay_layer() != nullptr;
  }

  void Diff(DiffContext* context, const Layer* old_layer) override;

  const PerformanceOverlayLayer* as_performance_overlay_layer() const override {
    return this;
  }

  explicit PerformanceOverlayLayer(uint64_t options,
                                   const char* font_path = nullptr);

  void Preroll(PrerollContext* context) override {}
  void Paint(PaintContext& context) const override;

#ifndef NDEBUG
  std::string DebugName() const override { return "PerformanceOverlayLayer"; }
#endif

 private:
  int options_;
  std::string font_path_;

  BASE_DISALLOW_COPY_AND_ASSIGN(PerformanceOverlayLayer);
};

}  // namespace clay

#endif  // CLAY_FLOW_LAYERS_PERFORMANCE_OVERLAY_LAYER_H_
